org.apache.taglibs.standard.tag.common.xml

Class XalanUtil

java.lang.Object

org.apache.taglibs.standard.tag.common.xml.XalanUtil

public class XalanUtil
extends java.lang.Object

Field Summary

Fields

Modifier and Type	Field and Description
private static javax.xml.parsers.DocumentBuilderFactory	dbf

Constructor Summary

Constructors

Constructor and Description
XalanUtil()

Method Summary

Modifier and Type	Method and Description
(package private) static java.lang.Object	coerceToJava(org.apache.xpath.objects.XObject xo) Return the Java value corresponding to an XPath result.
static org.apache.xpath.XPathContext	getContext(javax.servlet.jsp.tagext.Tag child, javax.servlet.jsp.PageContext pageContext) Return the XPathContext to be used for evaluating expressions.
private static org.w3c.dom.Document	newEmptyDocument() Create a new empty document.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

dbf

private static final javax.xml.parsers.DocumentBuilderFactory dbf

Constructor Detail

XalanUtil

public XalanUtil()

Method Detail

getContext

public static org.apache.xpath.XPathContext getContext(javax.servlet.jsp.tagext.Tag child,
                                                       javax.servlet.jsp.PageContext pageContext)

Return the XPathContext to be used for evaluating expressions. If the child is nested withing a forEach tag its iteration context is used. Otherwise, a new context is created based on an empty Document.

Parameters:

child - the tag whose context should be returned

pageContext - the current page context

Returns:

the XPath evaluation context

newEmptyDocument

private static org.w3c.dom.Document newEmptyDocument()

Create a new empty document. This method always allocates a new document as its root node might be exposed to other tags and potentially be mutated.

Returns:

a new empty document

coerceToJava

static java.lang.Object coerceToJava(org.apache.xpath.objects.XObject xo)
                              throws javax.xml.transform.TransformerException

Return the Java value corresponding to an XPath result.

Parameters:

xo - the XPath type

Returns:

the corresponding Java value per the JSTL mapping rules

Throws:

javax.xml.transform.TransformerException - if there was a problem converting the type